Patrick Lynch, president of the Patrolman's Benevolent Association, arrives at a makeshift memorial near the site where New York Police Department officers Rafael Ramos and Wenjian Liu were murdered in Brooklyn.

CITY HALL -- Mayor Bill de Blasio's meeting with police union leaders on Tuesday was "productive" but ended with "no resolve" after two and half hours, city and labor officials said.

The relationship between City Hall and the unions -- some of which are seeking new labor contracts -- have been strained since the chokehold death of Eric Garner over the summer. Tensions continued to mount after a grand jury declined to indict a police officer for Garner's death earlier this month, sparking protests against the decision and the NYPD.

Police unions have suggested that an anti-NYPD atmosphere has been facilitated by the mayor, who gave protestors breathing room and spoke about cautioning his biracial son about interactions with police following the grand jury decision.

The rift has gotten exponentially worse since a gunman shot and killed officers Rafael Ramos and Wenjian Liu. At times, police have literally turned their backs on de Blasio.

Patrolmen's Benevolent Association president Pat Lynch, who said the mayor had blood on his hands following the shootings, told reporters that there was no resolve following the meeting.

"There were a number of discussions, especially about the safety issues that our members face," Lynch told reporters. "There was no resolve and our thought here today is that actions speak louder than words and time will tell."

Along with the PBA, de Blasio and Police Commissioner William Bratton met with representatives from the Captains Endowment Association, the Lieutenants Benevolent Association, the Sergeants Benevolent Association and the Detectives' Endowment Association.

"Today's meeting focused on building a productive dialogue and identifying ways to move forward together," de Blasio spokesman Phil Walzak said in a statement after the meeting. "The Mayor and Police Commissioner remain committed to keeping crime in New York City at historically low levels, supporting the brave men and women in uniform who protect us every day, and finding ways to bring police and the community closer together."